The cable company remote will have under settings a program code function for the remote. Setting the Samsung code will enable the cable remote to adjust the volume. Many TVs have more than one code. You may need to try several to get the right one.

the attached images are examples of this process. Your remote supplied from the cable provider will have its own unique process. Consult the info supplied with the remote. Access the help feature available with some cable services. Your cable provider may have the help function available on their Website.

Hope this helps?